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Annotation of researchv10dc/dist/man/v4/man6/spline.6, revision 1.1

1.1     ! root        1: .th SPLINE VI 10/20/73
        !             2: .sh NAME
        !             3: spline \*- interpolate smooth curve
        !             4: .sh SYNOPSIS
        !             5: .bd spline
        !             6: [ option ] ...
        !             7: .sh DESCRIPTION
        !             8: .it Spline
        !             9: takes pairs of numbers from the standard input as abcissas and ordinates
        !            10: of a function.
        !            11: It produces a similar set, which
        !            12: is approximately equally spaced and
        !            13: includes the input set, on the standard output.
        !            14: The cubic spline output
        !            15: (R. W. Hamming,
        !            16: .ft I
        !            17: Numerical Methods for Engineers and Scientists,
        !            18: .ft R
        !            19: 2nd ed., 349ff)
        !            20: has two continuous derivatives,
        !            21: and sufficiently many points to look smooth when plotted, for
        !            22: example by
        !            23: .it plot
        !            24: (I).
        !            25: .s3
        !            26: The following options are recognized,
        !            27: each as a separate argument.
        !            28: .s3
        !            29: .lp +5 5
        !            30: \fBa\fR        Supply abscissas automatically (they are missing from
        !            31: the input); spacing is given by the next
        !            32: argument, or is assumed to be 1 if next argument is not a number.
        !            33: .s3
        !            34: .lp +5 5
        !            35: \fBn\fR        Output approximately 
        !            36: .it n
        !            37: points, where
        !            38: .it n
        !            39: is given by the next argument.
        !            40: (Default
        !            41: .it n
        !            42: = 100.)
        !            43: .s3
        !            44: .lp +5 5
        !            45: \fBp\fR        Make output periodic, i.e. match
        !            46: derivatives at ends.
        !            47: First and last input values should normally agree.
        !            48: .s3
        !            49: .lp +5 5
        !            50: \fBx\fR        Next 1 (or 2) arguments are lower (and upper) \fIx\fR limits.
        !            51: .i0
        !            52: .sh "SEE ALSO"
        !            53: plot(I)
        !            54: .sh AUTHOR
        !            55: M. D. McIlroy
        !            56: .sh BUGS
        !            57: A limit of 1000 input points is enforced silently.

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